Ngumoha, who is 17 years old, made his senior debut last season and has shown promising skills in the team's preseason games this month.
In the match against Yokohama F Marinos, Ngumoha scored a goal, impressing Slot with his quality and energy.
Slot believes that having young players like Ngumoha in the team is beneficial, as it brings new ideas and enthusiasm to the team.
However, Slot also pointed out that Ngumoha could have made a better pass in one instance, but overall, he is pleased with the young player's impact on the game.